GC connections

Find out more about Chromatography Research Supplies (CRS), now part of the Trajan family of brands.

We manufacture a wide variety of standard and specialty ferrules and seals used in gas chromatographs and other instruments. The commonly used materials are Vespel^®, PTFE, and exfoliated graphite.

The standard ferrule product line is used to seal tubing and capillaries to standard compression fittings in a variety of sizes.

Features and benefits

Made from high purity exfoliated graphite.
Seals with minimal torque and can be frequently reused if not over compressed.
Graphite ferrules do not shrink in use but are very soft and must be packed and handled with care.

Recommended applications

Graphite ferrules are commonly used in GC systems on the inlet and detector ends because they don’t stick to the column, and can be removed and reinserted easily. Graphite ferrules should not be used with GC/MS instruments because of permeability to air.

Product specifications

You should always trim a short piece of the column after replacing the ferrule to be sure that no graphite particles have plugged the column. Graphite ferrules are rated to 450°C.

More

Please refer to the part number list for more items.

For technical information such as manuals and MSDS please visit chromres.com/resources.

More information

Vespel® is a registered trademark of DuPont.

SilTite^® GC connections

Column connections in the GC have traditionally suffered from unreliability, leaks, excessive dead volumes and lack of inertness, leading to poor chromatography results and instrument downtime. SilTite^® GC connections are designed to minimize installation time and provide ongoing, robust connections throughout the life of the GC column.

The best connections are made to last

Easy to install and leak-free
Superb operational stability
Low dead volume
Chemically inert

The SilTite range includes:

SilTite metal ferrules - for connecting fused silica GC columns and tubing to mass spectrometer interfaces and injectors.
SilTite FingerTite^® ferrules - for each injector and detector, simplify your GC column installation.
SilTite µ-Union - to connect columns without the complications of conventional connectors.

Using SilTite GC connections means less time on maintenance, and more time to focus on your analysis!